The 9L0412H301 is a 12VDC 28mm thick Axial Fan with a ball bearing. This San Ace 40L series DC fan features UL1007 26AWG wire leaded power connection with +ve refers to red wire, -ve refers to black wire and sensor refers to yellow wire. The 9L type long life fan comes with an aluminum frame and plastic impeller. The direction of rotation of the fan is clock wise direction.